src/java/org/mxchange/pizzaapplication/beans/product/PizzaProductWebApplicationBean.java

   1 /*
   2  * Copyright (C) 2016 Roland Haeder
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU Affero General Public License as
   6  * published by the Free Software Foundation, either version 3 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU Affero General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Affero General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.pizzaapplication.beans.product;
  18
  19 import java.text.MessageFormat;
  20 import java.util.Collections;
  21 import java.util.List;
  22 import javax.annotation.PostConstruct;
  23 import javax.enterprise.context.ApplicationScoped;
  24 import javax.enterprise.event.Observes;
  25 import javax.faces.FacesException;
  26 import javax.inject.Named;
  27 import javax.naming.Context;
  28 import javax.naming.InitialContext;
  29 import javax.naming.NamingException;
  30 import org.mxchange.jshopcore.events.product.AddedProductEvent;
  31 import org.mxchange.jshopcore.model.product.Product;
  32 import org.mxchange.jshopcore.model.product.ProductSessionBeanRemote;
  33
  34 /**
  35  * General product controller
  36  * <p>
  37  * @author Roland Haeder<roland@mxchange.org>
  38  */
  39 @Named ("productController")
  40 @ApplicationScoped
  41 public class PizzaProductWebApplicationBean implements PizzaProductWebApplicationController {
  42
  43         /**
  44          * Serial number
  45          */
  46         private static final long serialVersionUID = 58_137_539_530_279L;
  47
  48         /**
  49          * "Cache" for all available products
  50          */
  51         private List<Product> availableProducts;
  52
  53         @Override
  54         public void addProduct (final Product product) {
  55                 // Is the product available?
  56                 if (product.getProductAvailability()) {
  57                         // Add it
  58                         this.availableProducts.add(product);
  59                 }
  60         }
  61
  62         @Override
  63         public void afterShopProductAdded (@Observes final AddedProductEvent event) {
  64                 // Is all valid?
  65                 if (null == event) {
  66                         // Throw NPE
  67                         throw new NullPointerException("event is null"); //NOI18N
  68                 } else if (event.getAddedProduct()== null) {
  69                         // Throw again ...
  70                         throw new NullPointerException("event.addedProduct is null"); //NOI18N
  71                 } else if (event.getAddedProduct().getProductId() == null) {
  72                         // And again ...
  73                         throw new NullPointerException("event.addedProduct.productId is null"); //NOI18N
  74                 } else if (event.getAddedProduct().getProductId() < 1) {
  75                         // Id is invalid
  76                         throw new IllegalArgumentException(MessageFormat.format("event.addedProduct.productId={0} is not valid.", event.getAddedProduct().getProductId())); //NOI18N
  77                 }
  78
  79                 // Add it here, too.
  80                 this.addProduct(event.getAddedProduct());
  81         }
  82
  83         @Override
  84         public List<Product> getAvailableProducts () throws FacesException {
  85                 // Return it
  86                 return Collections.unmodifiableList(this.availableProducts);
  87         }
  88
  89         /**
  90          * Initialization of this bean
  91          */
  92         @PostConstruct
  93         public void init () {
  94                 try {
  95                         // Get initial context
  96                         Context context = new InitialContext();
  97
  98                         // Try to lookup the bean
  99                         ProductSessionBeanRemote productBean = (ProductSessionBeanRemote) context.lookup("java:global/jshop-ejb/product!org.mxchange.jshopcore.model.product.ProductSessionBeanRemote"); //NOI18N
 100
 101                         // Get available products list
 102                         this.availableProducts = productBean.getAvailableProducts();
 103                 } catch (final NamingException e) {
 104                         // Continued to throw
 105                         throw new FacesException(e);
 106                 }
 107         }
 108
 109 }